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| author | John Chadwick <john@jchw.io> | 2023-07-08 02:52:03 -0400 |
|---|---|---|
| committer | John Chadwick <john@jchw.io> | 2023-07-11 18:35:41 +0000 |
| commit | 1079b537396fcf5cd6c50cc8af19b078a50cf547 (patch) | |
| tree | a09581a1683c5f44d82b26223521ce04c87d54e5 /src/corelib/serialization/qxmlstream.cpp | |
| parent | 417878904b39b444632df18f7dd37bcb073c0467 (diff) | |
Fix transparency in 16 bit and 24 bit ico files
As a result of the fix for QTBUG-75214, Qt inadvertently no longer
reads the AND mask that specifies transparency for 16-bit and 24-bit
ico files. This is because it tries to detect 32-bit icons by checking
icoAttrib.depth == 32, but icoAttrib.depth is set to the depth of the
QImage, not the depth of the icon, and 32-bit QImage is used for all of
the non-indexed cases (16-bit, 24-bit and 32-bit.)
This commit instead uses icoAttrib.nbits, which should reliably
determine whether or not the icon is 32-bit. This makes the behavior
consistent with other ico reading software, including Windows.
Also, adds a unit test that verifies correct behavior of icon masks,
checking for both QTBUG-75214 and QTBUG-113319.
Amends 1d128ed1dfbcf49453ada922e54381c37264fde5.
Fixes: QTBUG-113319
Change-Id: I89ac86ff16054c8925fff6afc8c530fa737f8385
Pick-to: 6.6 6.5 6.2 5.15
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Diffstat (limited to 'src/corelib/serialization/qxmlstream.cpp')
0 files changed, 0 insertions, 0 deletions